Segment Information (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is as follows:

	Three Months Ended March 31
	2015		2014
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	405.3	$	383.5
Group Short-term Disability	147.7		137.3
Group Life and Accidental Death & Dismemberment
Group Life	335.0		309.9
Accidental Death & Dismemberment	32.6		30.6
Supplemental and Voluntary
Individual Disability	117.9		115.9
Voluntary Benefits	191.7		175.3
	1,230.2		1,152.5
Unum UK
Group Long-term Disability	96.5		103.0
Group Life	30.5		34.8
Supplemental	12.0		13.9
	139.0		151.7
Colonial Life
Accident, Sickness, and Disability	196.5		189.1
Life	62.3		57.4
Cancer and Critical Illness	73.4		69.9
	332.2		316.4
Closed Block
Individual Disability	146.5		161.1
Long-term Care	158.2		156.5
All Other	0.2		0.3
	304.9		317.9
Total Premium Income	$	2,006.3	$	1,938.5

Selected Operating Statement Data by Segment

	Unum US		Unum UK			Colonial Life			Closed Block		Corporate			Total
	(in millions of dollars)
Three Months Ended March 31, 2015
Premium Income	$	1,230.2	$	139.0		$	332.2		$	304.9	$	—		$	2,006.3
Net Investment Income	215.0		23.5			37.0			320.4		6.1			602.0
Other Income	30.9		—			—			23.2		0.3			54.4
Operating Revenue	$	1,476.1	$	162.5		$	369.2		$	648.5	$	6.4		$	2,662.7
Operating Income (Loss)	$	214.3	$	32.6		$	77.6		$	26.7	$	(29.9	)	$	321.3
Three Months Ended March 31, 2014
Premium Income	$	1,152.5	$	151.7		$	316.4		$	317.9	$	—		$	1,938.5
Net Investment Income	223.1		33.6			36.6			315.5		7.0			615.8
Other Income	30.9		(0.1		)	(0.1		)	21.6		1.5			53.8
Operating Revenue	$	1,406.5	$	185.2		$	352.9		$	655.0	$	8.5		$	2,608.1
Operating Income (Loss)	$	207.5	$	36.5		$	79.1		$	28.3	$	(26.5	)	$	324.9

Assets by Segment

	March 31		December 31
	2015		2014
	(in millions of dollars)
Assets
Unum US	$	18,865.0	$	18,676.5
Unum UK	3,613.4		3,702.5
Colonial Life	3,774.7		3,692.2
Closed Block	34,462.1		33,960.2
Corporate	2,299.3		2,418.8
Total Assets	$	63,014.5	$	62,450.2

Reconciliation of Operating Revenue and Operating Income by Segment to Total Revenue and Income Before Income Tax

A reconciliation of "operating revenue" to total revenue and "operating income" to income before income tax is as follows:

	Three Months Ended March 31
	2015			2014
	(in millions of dollars)
Operating Revenue	$	2,662.7		$	2,608.1
Net Realized Investment Gain (Loss)	(15.3		)	6.3
Total Revenue	$	2,647.4		$	2,614.4
Operating Income	$	321.3		$	324.9
Net Realized Investment Gain (Loss)	(15.3		)	6.3
Non-operating Retirement-related Loss	(3.0		)	(1.4		)
Income Before Income Tax	$	303.0		$	329.8